He is apparently a huge player, slept with over 30 girls, and rumor has it he uses steroids... But?

I'm falling for him. He is 19,I'm 16. My brother told me the above info. Before, I was really into this guy. He is very nice, responsible (doesnt get drunk at parties), and we talked for a while. He asked about the two of us and an actual relationship. He doesn't seem like the type my brother is warning me about? What should I do? Keep my distance or give him a chance?